For Indoor Commercial Applications Only: Single Tankless H-Series Demand Duo™ This product is NOT intended for residential applications. CHS13080HiN .........80 Gallon, 130,000 BTU CHS13080HiP . ........80 Gallon, 130,000 BTU CHS16080HiN .........80 Gallon, 160,000 BTU CHS16080HiP . ........80 Gallon, 160,000 BTU CHS19980HiN .........80 Gallon, 199,000 BTU CHS19980HiP . ........80 Gallon, 199,000 BTU CHS160100HiN . ......100 Gallon, 160,000 BTU CHS160100HiP . ......
WARNING If the information in these instructions is not followed exactly, a fire or explosion may result causing property damage, personal injury, or death. • • • Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance. WHAT TO DO IF YOU SMELL GAS − Do not try to light any appliance. − Do not touch any electrical switch; do not use any phone in your building. − Immediately call your gas supplier from a neighbor’s phone.
1. Welcome ....................................................................................................................... 4 2. Safety............................................................................................................................ 5 2.1 Safety Symbols ....................................................................................................... 5 2.2 Safety Precautions ...............................................................................................
Thank you for purchasing Rinnai’s Demand Duo™ H-Series Commercial Hybrid Water Heating System. This manual provides information on the installation, operation, and maintenance of Rinnai’s Demand Duo™ H-Series Commercial Hybrid Water Heating System. Read this manual completely before installing or operating the system.
Topics in this section • Safety Symbols • Safety Precautions This manual contains the following important safety symbols. Always read and obey all safety messages. This is the safety alert symbol. This symbol alerts you to potential hazards that can kill or hurt you and others. Indicates an imminently hazardous situation which, if not avoided, will result in personal injury or death. DANGER Indicates a potentially hazardous situation which, if not avoided, could result in personal injury or death.
• • Keep the air intake location free of chemicals such as chlorine or bleach that produce fumes. These fumes can damage components and reduce the life of your appliance. Make sure the water heater and its water lines are protected from freezing. Damage due to freezing is not covered by the warranty. DO NOT adjust the internal gas valve. The design is such that adjustment is not required. Warranty will be voided if the internal gas valve is adjusted.
Topics in this section • Components • Specifications • Dimensions Figure 1: Components Electric Conduit Pump Dirt Leg Gas Swivel Gas Flex Line Flare Nut Adapter Front Cover (Supplied but not installed) DuoSmart™ Digital Controller Demand Duo™ H-Series Installation and Operation Manual 7
Table 1: Specifications Commercial Hybrid Water Heating System Consisting of Condensing Tankless Water Heater, Insulated Storage Tank, Pump and Controller Appliance Type Model CHS199100Hi CHS160100Hi Minimum Gas Consumption Btu/hr (kW/hr) Maximum Gas Consumption Btu/hr (kW/hr) Tank Volume Product Weight 199,000 (58.3) 317 Gallons (1,200 Liters) 431 lb (195 kg) Sound Level 49 dB Installation Type CHS13080Hi 160,000 (46.9) 199,000 (58.3) 160,000 (46.9) 130,000 (38.
Table 2: Recovery Capacity / Input Product Number Gas Type BTU/HR CHS199100Hi CHS160100Hi CHS19980Hi CHS16080Hi CHS13080Hi U.S. Gallon / HR Liters / HR at Temperature Rise Indicated Input NG/ LP 199,000 NG/ LP 160,000 NG/ LP 199,000 NG/ LP 160,000 NG/ LP 130,000 kW Tank Capacity °F 30°F 40°F 50°F 60°F 70°F 80°F 90°F 100°F 110°F 120°F 130°F 140°F °C 17°C 22°C 28°C 33°C 39°C 44°C 50°C 56°C 61°C 67°C 72°C 78°C 119 Gals.
LEFT Measurements below are shown in inches (mm). TOP CHS160100Hi 34.77 (883) Figure 2: Dimensions Ø 28.30 (718) 31.67 (804) Gas 24.94 (633) T&P 30.88 (784) PRV 34.07 (865) Condensate RIGHT 40.21 (1,021) CHS199100Hi 34.84 (885) Vent Models RIGHT 69.40 (1,762) 35.31 (897) Gas 34.24 (869) PRV 56.74 (1,441) T&P LEFT 71.10 (1,805) 1-1/2 in. MNPT Hot FRONT 4.20 (107) 1-1/2 in. MNPT Cold 3.
Models CHS19980Hi CHS16080Hi Measurements below are shown in inches (mm). TOP CHS13080Hi Figure 3: Dimensions 31.86 (809) 36 (914) 27.31 (694) Gas 16.58 (421) T&P 29.04 (704) PRV 29.04 (738) Condensate 31.73 (806) Gas 30.59 (777) Vent Ø 24.25 (616) RIGHT FRONT 64.71 (1,643) 1-1/2 in. MNPT Hot 62.69 (1,592) 30.76 (781) PRV 54.28 (1,379) T&P LEFT 4.19 (106)1-1/2 in. MNPT Cold 3.
Topics in this section • Installation Guidelines • What You Will Need • Choose an Installation Location THIS SECTION IS INTENDED FOR THE INSTALLER Installer qualifications: A trained and qualified professional must install the appliance, inspect it, and leak test the Demand Duo™ before use. The warranty may be voided due to any improper installation.
Carefully unpack your system package and verify the following contents are included. If any items are damaged or missing, contact your local dealer/distributor or call Rinnai Customer Care at 1-800-621-9419. Do not attempt to use any item that appears damaged.
Table 3: Water Quality Guidelines Contaminant Maximum Level Total Hardness Up to 200 mg/L Aluminum * Up to 0.2 mg/L Chlorides * Up to 250 mg/LL Copper * Dissolved Carbon Dioxide (CO2) Iron * Up to 1.0 mg/L Manganese * Up to 0.05 mg/L pH * 6.5 to 8.5 Up to 15.0 mg/L Up to 0.3 mg/L Do not store or use gasoline or other flammable vapors and liquids in the vicinity of this or ay other appliance.
Figure 5: Clearances 0 in. Minimum 0 in. Minimum 0 in. Minimum *6 in. Minimum ** 12 in. Minimum IMPORTANT Product installed in the state of California must be braced, anchored, or otherwise secured to avoid motion or falling during an earthquake. Contact the California Office of the State Architect located at 1102 Q Street, Suite 5100, Sacramento, CA 95811 for instructions. 1. Loosen screws along the perimeter of the plastic enclosures. 2. Remove plastic enclosures. 3.
Use this checklist to ensure you have selected the correct location for the water heater. □ □ The water heater is not exposed to corrosive compounds in the air. The water heater location complies with the required clearances. □ The planned combustion air and exhaust termination locations meet the required clearances. □ The water supply does not contain chemicals or exceed total hardness that will damage the heat exchanger.
Topics in this section • • Venting Requirements • Select a Vent Type • IMPORTANT If the vent system is to be enclosed, it is suggested that the design of the enclosure shall permit inspection of the vent system. The design of such enclosure shall be deemed acceptable by the installer or the local inspector. Refer to the instructions of the vent system manufacturer for component assembly instructions.
1. Install the water heater. 2. Determine the termination method — horizontal or vertical, concentric, or twin pipes, etc. Check to determine whether local codes supersede the following clearances: • Avoid termination locations near a dryer vent. 3. Determine proper location for wall or roof penetration for each termination. • Avoid termination locations near 4. Install termination assembly as described in this manual or in the vent manufacturer’s installation instructions.
Three types of venting options are available: Direct Vent 1 (Concentric Pipe and Twin Pipe) Concentric Pipe Twin Pipe Combustion air and exhaust vent directly through a single concentric connection. Hot exhaust exits through the interior tube, while combustion air enters through the outer layer. Figure 8 Figure 9 Exhaust Combustion air 2 Combustion air and exhaust vent directly through separate penetrations.
1 Direct Vent (Concentric Pipe and Twin Pipe) Figure 13: Direct Vent Termination Clearances (For Concentric and Twin Pipe) TERMINATION Clearance in Ref. A also applies to anticipated snow line X AIR SUPPLY INLET V VENT TERMINAL AREA WHERE TERMINAL IS NOT PERMITTTED SNOW Ref A B C Description Clearance above grade, veranda, porch, deck, or balcony Clearance to window or door that may be opened Clearance to permanently closed window Canadian Installations (CSA B149.1) U.S.
1 Direct Vent (Concentric Pipe) Figure 16 60 in. (1.52 m) Concentric Pipe Overview Note: 24 in. (0.61 m) to wall or parapet Combustion air and exhaust vent directly through a single concentric connection. Hot exhaust exits through the interior tube, while combustion air enters through the outer layer. Figure 14 Exhaust Combustion air Combustion air Between terminals at different levels Figure 17 12 in. (0.
1 Direct Vent (Concentric Pipe) Concentric Pipe Installation Instructions 1. Remove and discard screw from concentric flue connection. IMPORTANT Install the venting termination according to the diagrams and instructions in this manual. Slope the venting 1/4 in. per foot toward the appliance according to the vent manufacturer’s installation instructions. Dispose of condensate per local codes. Figure 18 Concentric Pipe Example Vent Applications 2.
1 Direct Vent (Twin Pipe) Figure 22 Twin Pipe Overview Combustion air Combustion air and exhaust vent directly through separate penetrations. Exhaust Twin Pipe Termination Clearances Figure 23 Intake 12 in. (0.30 m) minimum Indicates area in which intake cannot be located. 12 in. (0.30 m) minimum Exhaust 12 in. (0.30 m) minimum above combustion air opening Combustion Air 60 in. min 12 in. (0.
1 Direct Vent (Twin Pipe) Twin Pipe Installation Instructions The water heater is equipped with a 2 in. (51 mm) pipe connection. With the use of a pipe reducer, installers can use a 3 in. (76 mm) pipe for the combustion air and exhaust. 3. Install the combustion air vent pipe. Ensure it is properly seated. Secure the combustion air vent pipe to the combustion air vent connection with the supplied screw.
1 Direct Vent (Twin Pipe) Twin Pipe Example Vent Applications Slope horizontal exhaust 1/4 in. per foot towards the water heater. DO NOT slope combustion air pipe towards the water heater. This configuration requires the use of a Concentric Vent Termination 2 in. or 3 in. PVC/CPVC IPEX / Royal Concentric Side Wall Termination Configuration This configuration requires the use of a Concentric Vent Termination 2 in. or 3 in. PVC/CPVC IPEX /Royal Concentric Vertical Termination Configuration 2 in.
2 Non-Direct Vent (Room Air) Figure 28: Room Air Termination Clearances TERMINATION Clearance in Ref. A also applies to anticipated snow line X AIR SUPPLY INLET V VENT TERMINAL AREA WHERE TERMINAL IS NOT PERMITTTED SNOW Ref Description Canadian Installations (CSA B149.1) Other than direct vent (Outdoor unit and/or Room Air) 12 in. (30 cm) U.S. Installations (ANSI Z223.1 /NFPA 54) Other than direct vent (Outdoor unit and/or Room Air) 12 in. (30 cm) 36 in. (91 cm) 4 ft (1.
2 Non-Direct Vent (Room Air) NOTE • Installation of Non-Direct Vent (Room Air) must use listed category IV venting. • All terminations (horizontal and/or vertical) must terminate 12 in. above grade or anticipated snow level. Exhaust Termination Clearances for Internal (Indoor) Room Air Applications Figure 29 12 in. 12 in. (0.30 m) 60 in. (1.
2 Non-Direct Vent (Room Air) Combustion Air WARNING This water heater requires adequate combustion air for ventilation and dilution of flue gases. Failure to provide adequate combustion air can result in unit failure, fire, explosion, serious bodily injury or death. Use the following methods to ensure adequate combustion air is available for correct and safe operation of this water heater. IMPORTANT Combustion air must be free of corrosive chemicals.
2 Non-Direct Vent (Room Air) Combustion Air (Continued) Louvers and Grills When sizing the permanent opening consideration must be taken for the design of the louvers or grills to maintain the required free area required for all gas utilizing equipment in the space. If the free area of the louver or grill design is not available, assume wood louvers will have 25% free area and metal louvers or grills will have 75% free area.
2 Non-Direct Vent (Room Air) Figure 31 Exhaust Vent termination per ANSI Z223.1/NFPA 54. For clearances not specified in ANSI Z223.1/NFPA 54, clearances are in accordance with local installation codes and the requirements of the gas supplier.
2 Non-Direct Vent (Room Air) 4. Place the vent screen or room air screen inside elbow and secure with the supplied screw. Use the room air screen for environments where room air is dusty. Non-Direct Vent (Room Air) Installation Instructions NOTE • 2 in. vent screen supplied with water heater. 1. Remove and discard screw from combustion air vent connection. • Room air screen is available as an accessory. Figure 32 Glue elbow to the combustion air PVC vent pipe per manufacturer’s instructions.
2 Non-Direct Vent (Room Air) Non-Direct Vent (Room Air) Example Vent Applications 2 in. or 3 in. Schedule 40 PVC/CPVC Snorkel Termination Configuration 2 in. or 3 in. Schedule 40 PVC/CPVC Standard Upside Down "U" Vertical Termination Configuration 2 in. or 3 in. Schedule 40 PVC/CPVC Elbow or Tee Side Wall Termination Configuration 2 in. or 3 in. Schedule 40 PVC/CPVC Tee Vertical Termination Configuration Ubbink flexible venting approved for vertical non-direct vent (room air) applications only.
3 Common Vent (Indoor Units Only. Direct Vent and Non-Direct/Room Air Vent) Common venting allows multiple Rinnai Tankless Water Heaters to share the same vent system. Rinnai water heaters can only be common vented with Schedule 40 PVC/CPVC or with the Rinnai certified common vent system. Figure 37 • Vent system must be supported according to the vent manufacture’s installation instructions. • Venting should be as direct as possible with a minimum number of fittings.
Figure 38 For the table below: • • • • Header Vent Length Header is the main vent pipe into which several vents connect Vent Length is the distance from the end of the header to the vent termination. Maximum vent length starts at the end of the header system. Use 10 ft (3 m) as equivalent vent length for 90° elbows.
Equivalent Length (ft) Diagram Vertical Product Description Horizontal Various 3 in., 4 in. and 6 in. Schedule 40 PVC/CPVC Terminations Tee 10 90° Elbow 10 45° Elbow 5 Ubbink 800-621-9419 www.rinnai.us Product Description Equivalent Length (ft) Web Site Horizontal Phone Diagram Part Number Manufacturer Vertical Rinnai Common Vent Terminations (Ubbink C-Vent) 790096 790095 CVent Roof Termination 6 in. CVent Roof Termination 4in. 5 790125 CVent Roof Termination 3 in.
PVC solvents (primer and glue) can be extremely flammable. Vapors may cause a flash fire or explosion resulting in property damage, personal injury or death. WARNING • • • • Refer to vent manufacturer’s installation instructions for proper joint assembly procedures and products. • PVC/CPVC common venting should include a condensate drain and trap between the header and vent length. Condensate trap must include a loop that can hold 6 in. (15 cm) of water.
Topics in this section • Pressure Relief Valve Requirements • Temperature - PRV Requirements • Connect the Water Heater to the Water Supply • Typical Installations • Piping Diagram for Basic Installations • Piping Diagram for Multiple Unit Installations An approved pressure relief valve (preinstalled) is required by the American National Standard (ANSI Z21.10.3) for all water heating systems and shall be accessible for servicing.
• The T&P relief valve must be rated up to 150 psi and to at least the maximum Btu/hr of the appliance. • The discharge from the T&P relief valve should be piped to the ground or into a drain system to prevent exposure or possible burn hazards to humans or other plant or animal life. Follow local codes. Water discharged from the relief valve could cause severe burns instantly, scalds, or death. • The T&P relief valve must be manually operated once a year to check for correct operation.
• Slope the venting toward the appliance according to the vent manufacturer’s installation instructions. • All condensate must drain and be disposed of according to local codes. • Use only corrosion resistant materials for the condensate drain lines such as PVC pipe or plastic hose. • The condensate drain pipe (along its entire length) must be at least the same diameter as the drain line, (1/2 inch NPT). • The end of the condensate drain pipe should be open to the atmosphere.
A Hot Water Outlet * B Hot Water Outlet Valve * C Cold and Hot Unions * D Temperature-Pressure Relief Valve Figure 41 Hot Water Supply A B J C E Operation Unit / Temperature Control F Temperature-Pressure Relief Valve Discharge Pipe (do not cap, plug, or reduce) * G Pressure Relief Valve Discharge Pipe (do not cap, plug, or re- * H Condensate Discharge Pipe (Must include air gap) * I * Drain Pan K L D Cold Water Supply M E O F N I J Vent pipe (PVC Room Air shown * for illustratio
Building Hot Water Supply Line Figure 43 Tank T&P Tankless PRV Gas Supply Condensate Drain Line Pipe T&P to Open Drain Building Circulation Pump Cold Water Supply Building Hot Water Return Line (Optional) Commercial Hybrid Single Unit Circulation Note: Installation must conform to applicable code and all requirements listed in the installation manual. Balancing valves, equivalent piping, pressure gauges, and temperature gauges are to be used as necessary to ensure proper flow between units.
Demand Duo™ H-Series Installation and Operation Manual 42 Components of the condensate drainage shall be CPVC or PVC material. All components shall be selected for the pressure and temperature rating of the installation. Where the drain pipes from more than one unit are manifolded together for condensate drainage, the pipe or tubing shall be sized in accordance with an approved method as dictated by local codes. Condensate must be disposed of according to local codes.
Topics in this section • Connect the Gas Supply • Connect Electricity • Pump Controller To connect the gas supply, follow the instructions below: WARNING • • • • • A licensed professional must install the gas supply. Turn off 120V power supply. Turn off the gas. Gas is flammable. Do not smoke or provide other ignition sources while working with gas. Do not turn on the water heater or gas until all fumes are gone. 1. Install a manual gas control valve in the gas supply line to the water heater.
5. Before placing the appliance in operation, all joints including the heater must be checked for gas tightness by means of soap, gas leak detector solution, or an equivalent nonflammable solution, as applicable. (Since some leak test solutions, including soap and water, may cause corrosion or stress cracking, the piping shall be rinsed with water after testing, unless it has been determined that the leak test solution is non-corrosive.) Figure 47 6.
4. Thread the flare side of the 36 in. Gas Flex into the flare side of the Gas Flare Adapter (Figure 50). Figure 48 Figure 50 3/4 NPT Side Flare Side 36 in. Gas Flex Flare Side 1. Remove Gas Flare Adapter from the end of the Gas Flex Hose Assembly. 2. Apply a pipe sealant approved for gas to the 3/4 NPT side of the Gas Flare Adapter. NOTE DO NOT apply sealant to the parallel threads on the flare side of the Gas Flare Adapter. 5.
WARNING • • Do not use an extension cord or adapter plug with this appliance. The water heater must be electrically grounded in accordance with local codes and ordinances or, in the absence of local codes, in accordance with the National Electrical Code, ANSI/NFPA No. 70. The water heater is equipped with a three-prong (grounding) plug for your protection against shock hazard and should be plugged directly into a properly grounded three-prong receptacle.
1. Locate the electric conduit on the side of the water heater (Figure 53). Figure 53 4. Install conduit into the knockout opening and pull the green, white and black wires into the box. 5. Strip the green, white, and black field supplied wires 1/2 in. Make sure the conductors are completely bare (Figure 56). Figure 56 2. Remove the two screws around the outlet cover. Remove the outlet cover and prewired outlet (Figure 54).
The system controller maintains communication between the tank and tankless via the tankless communication cable to effectively control the tank temperature based on the selected temperature on the tankless unit. The system controller will energize (120V) the pump when the tank temperature drops. When the tank temperature returns to the selected set temperature, the system controller will de-energize the pump and remain in standby until the tank temperature drops again.
□ The water heater is not subject to corrosive compounds in the air. □ Confirm that the electricity is supplied from a 120 VAC, 60 Hz power source, is in a properly grounded circuit, and turned on. □ The water supply does not contain chemicals or exceed total hardness that will damage the heat exchanger. □ Verify the temperature controller is functioning properly. □ Clearances from the water heater unit are met. □ Confirm parameter settings are set appropriately for the altitude.
Topics in this section • Replacement Parts • Service/Maintenance Log Anodes The storage tank is equipped with two magnesium anodes designed to extend the life of the storage tank. Slowly consumed over time, the anode protects the glass-lined tank from corrosion. It is strongly recommended to inspect the anodes every two (2) years. If more than half of the anodes has been consumed, they should be replaced. Instructions on how to change the anodes can be obtained from the manufacturer.
Demand Duo™ H-Series Installation and Operation Manual 51 90° FEM X MALE ELBOW, 3/4IN HOT, COLD, PRV VALVE KIT ANODE ROD, MAGNESIUM BRASS DRAIN VALVE 3/4 X 2-3/4 ELECTRICAL ASSEMBLY DIRT LEG 3/4 IN GAS SWIVEL GAS FLEX HOSE 23 24 25 26 27 28 29 30 107000185 107000284 107000314 107000315 105000337 106000165 106000164 106000166 21 107000401 20 107000255 TUBE, 43.
Demand Duo™ H-Series Installation and Operation Manual 52 DESCRIPTION 104000297 107000387 107000308 107000309 107000472 107000257 107000375 105000322 105000225 107000452 107000260 107000458 107000311 107000312 109000633 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 90° FEM X MALE ELBOW, 3/4IN HOT, COLD, PRV VALVE KIT ANODE ROD, MAGNESIUM BRASS DRAIN VALVE 3/4 X 2-3/4 ELECTRICAL ASSEMBLY DIRT LEG 3/4 IN GAS SWIVEL GAS FLEX HOSE 23 107000185 24 107000284 25 107000314 26 27 28 29 30 107000315 105000337 106
Date Service / Maintenance Completed Demand Duo™ H-Series Installation and Operation Manual 53
Limited Warranty for Demand Duo H-Series What Is Covered? The Rinnai Standard Limited Warranty covers any defects in materials or workmanship when the product is installed and operated according to Rinnai written installation instructions, subject to the terms within this Limited Warranty document. This Limited Warranty applies only to products that are installed correctly in the United States and Canada. Improper installation may void this Limited Warranty.
What Is Not Covered? This Limited Warranty does not cover any failures or operating difficulties due to the following: • Accident, abuse, or misuse • Improper maintenance (such as but not limited to scale build-up, freeze damage, or vent blockage) • Misapplication of this product • Incorrect sizing • Improper installation (such as but not limited to) • − Product being installed in a corrosive environment Any other cause not due to defects in materials or workmanship • Problems or damage due to fi
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